I am testing 2x USRP1 with RFX2400 daughter
cards with benchmark_rx and benchmark_tx scripts and have questions.
When I set the MCS to dbpsk, error rate
I got was close to zero.
When I set it to dqpsk, d8psk, error
rate is 100%.
When I set it to gmsk, certain daughter
cards had close to 0 error rate, but certain swung from 0% to 100%.
I asked about it to Ettus research,
they told me that it's likely to be due to frequency offset between the
two boxes I have.
If it is true,
1) how can I compensate the offset?
2) Has someone used dqpsk, d8psk in
2.4MHz ISM band before? If so, what extra step is necessary?
Thanks,